Python 运行简单 shell 脚本的文本菜单

Question

I have no idea how to go about this so I'm not sure where to start.

Basically I want to write a python script that will present a user with a list of items that can be toggled through and selected using the arrow keys and enter key. If python isn't able to do this is there another language that can?

The selection made will then run a simple line of shell script (in raspbian)

The idea is that I'll use this a list of games that my raspberry pi will run using MAME. ie a nice simple way of selecting a game as opposed to writing in the line of code every time.

Cheers

Answer 1

You'd want to look at curses . Search Google for tutorials, eg, here . It's a nice library to create an interface as you describe here.

When you have your minimalistic GUI running, use the subprocess -module to launch your scripts, eg

import subprocess
subprocess.call(["my_script.sh","parameter1","parameter2"])

Edit

Seems like curses doesn't support selectable lists, but ncurses does. In the Debian repositories, there is python-urwid , some Python-bindings to ncurses.

An example would be:

import urwid
import subprocess

games = {"Game1":"script_name1.sh",
         "Game2":"script_name2.sh",
         "Game3":"script_name3.sh",
         "Game4":"script_name4.sh",
         "Game5":"script_name5.sh",}

class ItemWidget (urwid.WidgetWrap):

    def __init__ (self, id, description):
        self.id = id
        self.content = description
        self.item = [
            ('fixed', 15, urwid.Padding(urwid.AttrWrap(
                urwid.Text('%s:' % str(id)), 'body', 'focus'), left=2)),
            urwid.AttrWrap(urwid.Text('%s' % description), 'body', 'focus'),
        ]
        w = urwid.Columns(self.item)
        self.__super.__init__(w)

    def selectable (self):
        return True

    def keypress(self, size, key):
        return key

def main ():
    palette = [
        ('body','dark cyan', '', 'standout'),
        ('focus','dark red', '', 'standout'),
        ('head','light red', 'black'),
        ]

    def keystroke (input):
        if input in ('q', 'Q'):
            raise urwid.ExitMainLoop()

        if input is 'enter':
            view.set_header(urwid.AttrWrap(urwid.Text("selected"), 'head'))
            focus = listbox.get_focus()[0].content
            try:
                subprocess.call(games[focus])
            except OSError, ose:
                view.set_header(urwid.AttrWrap(urwid.Text(
                    'error starting %s: %s' % (str(focus), str(ose))), 'head'))

    items = []
    game_keys = sorted(games.keys())
    for i, k in enumerate(game_keys):
        items.append(ItemWidget(i, k))

    header = urwid.AttrMap(urwid.Text('selected:'), 'head')
    listbox = urwid.ListBox(urwid.SimpleListWalker(items))
    view = urwid.Frame(urwid.AttrWrap(listbox, 'body'), header=header)
    loop = urwid.MainLoop(view, palette, unhandled_input=keystroke)
    loop.run()

if __name__ == '__main__':
    main()

This is adapted from nicosphere .

Answer 2

You need to change "," to "as" at line 45 to put it to work at python 3.10:

        except OSError as ose:
            view.set_header(urwid.AttrWrap(urwid.Text(
                'error starting %s: %s' % (str(focus), str(ose))), 'head'))